ou drive on Interstate 10 from San Antonio to Houston, half the time at 77 km/h and the other half at 119 km/h. On the way back you travel half the distance at 77 km/h and the other half at 119 km/h. What is your average speed (a) from San Antonio to Houston, (b) from Houston back to San Antonio, and (c) for the entire trip
Physics
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